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Preparation of Chitosan-based Injectable Hydrogels and Its Application in 3D Cell Culture
Published on: September 29, 2017
A 3R (remove-remodel-repair)-integrated self-assembled Chlorella-gelatin-PEG hydrogel for diabetic wound healing
Yulin Li1,2,3, Ruiying He1,2, Yu Huang4,5
1The Key Laboratory for Ultrafine Materials of Ministry of Education, State Key Laboratory of Bioreactor Engineering, Engineering Research Center for Biomedical Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, China.
A novel hydrogel (CPGel) effectively treats diabetic wounds by eliminating bacteria, reducing inflammation, and promoting tissue repair. This Chlorella-based biomaterial achieved 100% wound closure in diabetic mice, offering a promising new therapy.
Area of Science:
- Biomaterial Science
- Regenerative Medicine
- Traditional Chinese Medicine
Background:
- Diabetic wound healing is complicated by bacterial infections, oxidative stress, and chronic inflammation.
- Current treatments often fall short in addressing the multifaceted nature of these wounds.
Purpose of the Study:
- To develop a multifunctional hydrogel (CPGel) inspired by traditional Chinese medicine for diabetic wound management.
- To evaluate the efficacy of CPGel in addressing bacterial infection, oxidative stress, inflammation, and promoting tissue regeneration.
Main Methods:
- CPGel was synthesized using solvent-driven self-assembly of Chlorella extracts, gelatin, and polyethylene glycol (PEG).
- The hydrogel's antibacterial, antioxidant, immunomodulatory, pro-angiogenic, and pro-collagen deposition properties were assessed.
- In vivo studies were conducted on diabetic mice to evaluate wound closure rates and tissue regeneration.
Main Results:
- CPGel demonstrated complete eradication of *E. coli* and *S. aureus*, 65% ROS scavenging, and polarization of M1 to M2 macrophages.
- Significant acceleration in tissue regeneration was observed, with a 9-fold increase in angiogenesis (α-SMA) and a 2-fold increase in collagen I deposition.
- CPGel achieved 100% wound closure in diabetic mice within 21 days, compared to 73% in controls, and promoted neovascularization and hair follicle regeneration.
Conclusions:
- CPGel effectively addresses the key challenges in diabetic wound healing through a synergistic 'Remove, Remodel, Repair' strategy.
- This Chlorella-based hydrogel represents a scalable, toxin-free therapeutic platform with high potential for clinical translation.
- The study highlights the successful integration of traditional herbal medicine principles with advanced biomaterial engineering for chronic wound management.
